Combined type-writing and computing machine.



GJO. D'EGENER.

COMBlNED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED 0C.T.l2|19I5.

Patented Sept. 10, 1918.

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G. O. DEG ENER. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT. l2. I915.

Patented Sept. 10,1918.

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a N n A E WI'I'N ESSES %WZM WW G, 0. DEGENER.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT-12 1915- 15 SHEETS-SHEET 4.

Patented Sept. 10, 1918.

INVENTOR WW ATTOR Y.

G. O. DEGENER.

COMBKNED TYPE WRITING AND COMPUTING MACHlNE.

APPLICATION FILED OCT. I2, 1915.

Patented Sept. 10, 1918.

15 SHEETS SHEET 5.

Wl'lTN ESSES= WWW G. O. DEGENER.

COMBINED TYPE WHIHNG AND COMPUTING MACHINE.

APPLICATION FILED OCT. F2. was.

1378,4425. I Patented Sept. 10,1918.

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INVENTOR:

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'G. O. DEGENER. COMBINED TYPE WRITING'AND COMPUTING MACHINE.

APPLIC ATIOII FILED OCT. 2, 1915- Patented Sept. 10, 1 918.

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INVENTOR= MA V ATTOBN EY.

G, 0. DEGENER. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT. 12, 1915. 1,278,445. PatentedSept 10, 1918.

5 SHEETSSHEET 8.

WITN ESSES INVENTOR Waaw Q BY ATTOR EY.

G. O. DEGENEFI COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED ocr. I2. I915.

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APPLICATION FILED OCT. I2. I9I5. 1,278,445. I Patented Sept. 10,1918.

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INVENTQRI ATTORNE WITNESSES G. 0. DEGENER. COMBINED TYPE WRITING AND COMPUTING MACHINE.

1 1,278,445. AF LICATlON FILED OCT I2 1915 patentedseptl 10,

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G. 0. DEGENER COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED OCT. 12, ISIS- Patented Sept. 10, 1918.

I5 SHEETSSHEET [2- INVENTOR= G. 0. DEGENER. I COMBINED TYPE WRITING AND: COMPUTING MACHINE.

APPLICATION EILED. OCT. 12, 1915- 1,278,445. Patented Sept. 10.1918.

l5 SHEETS-SHEET I3 INVENTOR WITN EssEs= I BY ATTOR EY.

G. O, DEGENER. COMBINED TYPE WRITING AND COMPUTING MACHiNE.

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COMBINED TYPE WRITING AND COMPUTING MACHINE.

Patentedsepig. 10, 1918 15 SHEETSSHEET 15 FL m L C o D m H N 0 H A C H DI DI A Q RQ mvsmoa: fiA W AT TO R N QWMQ 1 W M WW UNITED STATES PATENT OFFICE.

GUSTAVE O. DEGENER, OF NEW YORK, N. Y., ASSIG-NOR, BY MESNE ASSIGNMENTS, TO

UNDERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORA- TION OF NEW YORK.

Specification of Letters Patent.

Patented Sept. 10, 1918.

Application filed October 12, 1915. Serial No. 55,448.

To all whom it may concern:

Be it known that I, GUSTAVE O. DEGENER, a citizen of the United States, residing in New York city. in the county of New York and State of New York, have invented cer tain new and useful Improvements in Combined' TypeJVI-iting' and Computing Machines, of which the following is a specification.

My invention relates to computing machines, and is herein illustrated as applied to acombined typewriting and computing machine wherein the typewriter is an ordinary Underwood No. 3 typewriting machine comprising the usual alphabet and numeral keys, platen shift and decima-l-tabulating mechanism.

One of the objects of my invention is to provide a machine in which the typewriting and computing is done without adding considerable extra load on the keys, so that the same may be operated by a typist of ordinary t pewriting experience. Another objecto the invention is the, design of the computingmechanism of such a character as to eliminate many of the safety devices usually required, thereby reducing cost and complication. Another object is to so construct the registering mechanism and its driving mechanism so that the connecting and disconnecting of the driving mechanism from the registering mechanism is accom plished by a method allowing the greatest latitude in alinement. A further object is to have the register as small and light as possible, as the same must be moved step by step by the typewriter carriage. A further object is to provide a machine which can be readily restored, through a handle convenient to the operator, to an operative condition, should same become blocked through improper manipulation of the keys, as by striking two keys simultaneously or by striking keys at a comma-position of the register.

With these and other objects in view, I have found it advantageous to rovide a machine in which certain parts 0 the computing mechanism are constantly under tension tending to drive them. With this end in view I have found it advantageous to connect a driving member to each one of the numeral keys, but'to so connect said driving member that the numeral key is effective on it only to cause it to become an interponent between the power-drive and the totalizer in which the individual digits are added. pressed to throw its 'interponent into effective position, said numeral key may-operate a universal bar which connects said key to the power-drive in such a way that the power-drive positively completes the depression of the key and holds the key depressed to its full extent while the digit represented by said key is being carried into the computing mechanism. This carrying-in of the digit, as indicated above, may be done by means of an interponentwhich is operated by the key, and I have found it advantageous to make such interponents in the form of gears, each gear having a number of teethproportional to the digit or numeral key operating it. These'inter onents may be in the form of gears slida 1e on a universal shaft which forms part of the mechanism constantly under tension, and whenever any numeral key is depressed said shaft may rotate a full revolution, thus carrying all the interponents around with it. The interponents, however, normally being in ineffective position, only that interponent will compute which has been shifted to its effective )osition along said shaft.

I have found it possible to put a handle on this shaft for manually turning it, thus enabling the operator or typist to manipulate said shaft if any parts jam, and this" manipulation, even if done blindly, will usually result in freein the machine. If this handle is turned bac wardly, it may release the key which has been depressed to do \Vhenever a numeral key is dethe computing, and erase whatever digit has been partially carried into the totalizer. Al-

though this may result in letter-feeding of the carriage for one space, it leaves the totalizer mechanism precisely as it was before the error occurred, and the operative will see at once from the position of the typewriter carriage what was the nature of the error made, and to what oint it is necessary to go back to correct t 1e error, Such a feature is of course especially valuable on a visible writing machine like the Underwood typewriter, to which I have shown my invention as applied.

To accomplish these results I have found it advantageous to incorporate a spring motor in the machine, which constantly keeps the parts under tension, and to avoid the necessity of frequently winding up said 1110- tor, I have provided an electric motor which automatically winds said spring after it has partly run down. The capacity of the spring motor, however, is such that quite a computation can be carried on thereby with out rewinding, thus often enabling; a typist to finish up a given piece of work if the electric current should give out from any unexpected cause.

In machines as hitherto built, parts at-. tached to the type iter carriage were designed to cooperate with parts attached to or journaled on the typewriter frame, and such parts have frcquently been found a source of disaster. because such parts sometimes fail to coo to properly. Such failure to cooperate, if even to trivial extents, was likely to result in wrecking the machine. To avoid such troubles, l have found it advantageous to provide a totalizing niechanism in which the computing wheels are part of a totalizer structure, whereas the master wheel and'carryvcr devices form a structure which is normally entirely disconnected from the totaliser structure, but which becomes connected thereto every time a digit is to be computed. Such a structure permits the typewriter carriage to travel along freely at ordinary times, thus miniinizing any possibility of wrecking various parts. Such a structure, in addition, permits a good many parts to be made much heavier for the purpose of greater strength, or much lighter for the purpose of ease and lack of shock in operating.

It has frequently been proposed to cause the typewriter carriage to shift the mechanism of a computing device from addition to subtraction in certain columns, and vice versa, and such connections may lead to the same kind of trouble which is indicated above as likely to occur between the totalizer and some coop rating parts. To avoid such troubles, l ha e provided a mechanism in which the travel of the typewriter carriage is normally without efiect on the computing mechanism in any sense of the word, because the travel of the carriage in no way determines whether the machine shall add or subtract the numbers written. To relieve the mind of the operative of the need of remembaring when to add and when to subtract, l have found it advantageous to provide an interponent connected to the typewriter carriage, such that whenever a numeral key is depressed the computing mechanism will automatically shift the connections in a manner determined by said interponent to cause the digit to be computed at the mo ment to be added or subtracted as the case may be.

in addition to this feature, there may be a totalizer Winch is manually settable to add or subtract. 1 have herein illustrated this adding and subtracting as beingelfected by clutches which are shiftable to either of two positions, one of which may be called the forward and the other the reverse position. The mechanism may be provided with another manual handle which is adapted to reverse said clutches from whatever position they have been occupying. and momentarily shift them to the reverse position. This I have been able to accomplish without altering the previous setting of said clutches except for the momentary action while the said second manual handle is effective.

I have found it possible to do away with many overthrow deviceswhich it might be supposed were essential. For this purpose I have found it necessary to provide only a single pawl for arresting the master wheel shaft. This pawl may be thrown into effective position almost a full tooth before the pawl is intended to become effective, thus preventing overthrow and enabling more rapid operation of the machine than would otherwise be possible.

()ther features and advantages will hereinafter appear.

In the accompanying drawings.

Figure l is a general fractional front elevation of the computing mechanism. with parts broken away for clearness.

Fig. 1 is a fractional front view showing); the pawl which connects the column and cross-totalizer carriages in the act of being disengaged prior to returning the crosstotalizer carriage to its normal position.

Fig. 2 is a general side elevation of the computing mechanism on the right side of the machine in normal position, the column totalizer being set fox-addition.

Fig. 3 is a sectional side elevation showing the master wheels in normal ineffective position, and the spring motor and its gearing.

Fig. 4: is a sectional side elevation through the typewriter and part of the computing mechanism, showing the connections to the rear of the typewriter and part. of the computer-releasing mechanism in normal position.

Fig. 5 is a sectional side elevation showing the typewriter platen in upper-case position, and the computenreleasing mechanism in ineffective position.

Fig. 6 is a fractional front elevation of the left side of the machine, showinp the mechanism operator for manually rendering the computing mechanism ineffective.

Fig. 7 is a perspective view of the indexing and disconnecting mechanisms, with parts broken away for clearness.

Fig. 8 is a side sectional view through the indexing mechanism and its connection to a numeral key, in normal position.

9 is a fractional plan view of the parts shown 8.

Fig. 10 is a fractional side view of the indexing mechanism, similar to Fig. 8, showing the parts in a position when the numeral key is depressed.

Fig. 11 is a fractional plan view of the parts in Fig. 10.

Fig. 12 is a front view of the numeral keys and their connections to the indexing mechanism, with parts broken away to show the underlying structure, with the manual disconnecting mechanism in ineffective position.

Fig. 13 is a fractional side view of the computer-releasing mechanism just after the computing mechanism has been released by the depression of a numeral key.

Fig. 11 is a view similar to Fig. 13, showing the position of the parts in which a depressed numeral key is held down by the indeXing mechanism.

Fig. 15 is a fractional side elevation of the computer-releasing mechanism, and its connections to the cams at the rear of the typewriter carriage.

Fig. 16 is a perspective view, looking from the rear, of the cams at the rear of the typewriter carriage, and their connections to the computing mechanism on the right side of the machine, and the automatic electric switch-operating mechanism and its connections to the key-locking mechanism.

Fig. 17 is a perspective view, looking from the rear, showing the universal key-locking bar and part of its connections to the switchoperating mechanism.

Fig. 18 is a side view of one of the mechanisms and associated parts to prevent overthrow at the end of a computation.

Fig. 19 is a side view of the mechanism for swinging the inaster wheels into mesh with their registers, showing the master wheels in their effective position. 1

Fig. 20 is a side viewshowing the mechanism for operating the overthrow-preventin detents for the master Wheels and inb l dexing mechanism.

Fig. 21 is a side view showing the parts in Figs. 18 and 20 near the end of a com-- putation, and their relative positions.

Fig. 22 18 a detail new of a change gear, looking from the rear, through which the master wheel is driven.

Fig. 23 is a side view showing the parts which automatically set the cross-totalizer to subtraction at the depression of a numeral key.

Fig. 24 is a side view of the parts shown in Fig. 23, with the reversing mechanism in effective position.

Fig. 25 is a side view similar to Fig. 23, but showing the parts set for addition.

Fig. 26 is a side view similar to Fig. 25, with the reversing mechanism in effective position.

Fig. 27 is a side view showing the revers- ,mechanism in effective position,

Fig. 29 is a View similar to Fig. 28, showing the setting and reversing mechanisms in normal position.

Fig. 30 is a side view of the setting mech anism for the column-totalizers in adding position, with the reversing mechanism in effective position.

Fig. 31 is a side sectional view through the coluinn-totalizer register lock, and carriage, showing the master wheel in effective position.

Fig. 32 is a view similar to Fig. 31, with the master wheel in its normal ineffective position.

Fig. 33 is a fractional view of the master wheel and tens-carrying mechanism in effective position, prior to a tens-carrying ac tion, with parts broken away for clearness.

Fig. 3-1 is aview similar to Fig. 81, showing the parts just at the completion of a tens-carrying action.

Fig. 35 is a view similar to Fig. 33, but looking in the opposite direction, showing the parts during a tens-carrying action.

Fig. 36 is a skeleton perspective View of a dial wheel, a computing wheel, and a carry-over element, in a tens-carrying action,

the parts being broken away for clearness.

Fig. 37 is a perspective view similar to Fig. 36, showing the dial and computing wheels of next higher denomination to those in Fig. 36, at the completion of a tens-carrying action.

Fig. 38 is a dissected perspective view of a computing wheel and a tens-carrying element.

, Fig. 39 is a detail front View of the master wheel and carry-over mechanism in mesh with a register, and the computing wheel lock to the right of the master wheel, with parts in section to show the structure.

Numeral keys 40 and character keys l1 depress key levers 42 to rock bell-cranks 43, to swing type-bars 44 upwardly and rearwardly, to cause type 45, 46 thereon to print stantly under the tension of a spring barrel 50 which tends to move the carriage in letter-feeding direction, said motion taking place at each depression of a key. The carriage is controlled in its step-by-step letter feeding motion by the usual escapement wheel 51 on a pinion 52, meshing with a rack 53 connected to the typewriter carriage 49.

To permit the escapement wheel to turn, the dogs 54: and 55 are rocked at each depression of a key by a universal frame 56 which is moved rearwardly by a heel 57 on each type-bar, which strikes the universal frame each time a type prints on a worksheet wound around the platen.

Jump movements of the carriage 49 may also be obtained in addition to the step-bystep movements, for the purpose of rapidly positioning the typewriter carriage in and at a computing zone. For this purpose the machine may be provided with the usual Underwood decimal tabulating mechanism which includes keys 58 mounted on the front ends of key levers 59 (Figs. 3 and &),which are pivoted intermediate their ends, the rear end of each of which is connected to raise its plunger 60 into the path of one of a plurality of stops 61 mounted on a rack bar 62, said stops being adjustable at letter-space intervals along the rack bar which forms part of the typewriter carriage 4:9. At the raising of any of the plungers 60, the rack bar 53 is disconnected from its pinion 52, by the usual carriage-release mechanism, not shown herein, thus releasing from the -lettor-feed escapement mechanism the carriage 49 which is rapidly drawn in letter-feed direction until arrested by one of the stops 61 thereon, striking against the raised plunger or counter stop 60.

The type-bars at for the keys 4:0 and ll are each provided with two sets of type 4-5 and 46 so that they control selectively the writing of two different characters. On the numeral keys' the digit types 46 are usually placed to print in lower-case position, while other characters are printed by the uppercase type d5. To effect the change from writing normally lower-case characters to writing upper-case characters the platen 47 is mounted to be shifted from a lower-case position to an upper-case position. For this purpose there is provided a shift key 63 on a lever 64, the rear end of which engages a shift frame 65 pivoted on the frame work of the typewriter and provided with a horizontal rail 66 on which rests a roller 67 mounted on the platen frame 48. On depression of said shift key the rail 66 is caused to move upwardly, thus raising the platen frame 48 to bring the printing line of the platen l7 opposite the upper-case type 45 on the type-bars 44% when the latter are swung to their printing position.

To control the computing mechanism, each numeral key lever 42, except the zero key lever, (Figs. 1, 7, 8, 10, and 12) near its forward end has pivotally connected thereto a pendant or thrust link 68, the lower end of which is formed in the shape of a plate 69, to the right of which is fastened by means of rods 7 0 a plate 71 of the same .shape as and directly opposite the plate 69. The zero key-lever is not connected to the computing mechanism since it is only necessary to print and letter-space when zero is computed. The plates 69 and 71, have cams, 72 and 73 respectively, formed at their forward ends, (Figs. 7, 9, and 11) which straddle a sliding indexing member 7+1, normally in ineffective position (Fig. 9), and are guided by slots 69 cut in the cam frame 69, 71. A universal rock shaft 69 passes through the slots of all the cam frames. The ends of sleeves 69 fast on the rock shaft, steady the cam frames 8, and 10). -On the depression of any numeral key its cam 7 2 acting against the left hub 78 of the interponent 7* moves it rightwardly to aline the gear segment 75 thereon with one of a series of nine gear wheels 79, all of which are fast on a shaft 80, journaled in the framework in front of the shaft 76. Each of the gear segments or wheels 75 has I 1 a smooth portion 81, and this is the part of the wheel brought opposite the associated gear wheel 79 at the depression of a numeral key, so that when it revolves each wheel 75 .has some idle movement before the teeth thereof come into driving engagement with the gear 79. The extent of this idle movement is greatest for the 1 key and smallest for the 9 key. The segments 7 5 are so arranged on the power driven shaft 76 that the various segments 75 will begin to impart rotation to the gears 7 9 at various points in the rotation of the segments, depending upon the amount of idle motion provided by the smooth surfaces 81, but said shaft will cease to impart rotation to the gears at the same point in its rotation for each segment, thus providing a different amount of idle rotation for each of the segments 75 before their engagement with their respective gears 79 and a uniform amount of idle motion of said segments after the gears 79 have ceased rotating. The object of the latter provision is to make possible the operation of a highly efiicient overthrowpreventing mechanism as will hereinafter appear.

In the normal operation of the machine the shaft 76 turns in counter-clockwise direction (in Figs. 7, 8 and 10), but is normally held against said turning because on the left end of the shaft 76, (Figs. 4, 5, 6, 7, 12, 13, 14, and 15) is fast a cam disk 82 which has a projection 83 formed on its left side to engage a pawl 81,pivoted on the framework electric motor. through a spring which stores power from said motor. For this purpose on the base of the machine to the right of the typewriter.framework are fast two vertical plates 88 and 89. between which is mounted the driving mechanism of the computing machine (Figs. 1, :2. and 3),

which consists of an electric motor 90. the main or drive shaft 91 of which is its commutator shaft and is journaled at its ends in the plates 88. 89 (Fig. 1). and carries a spur pinion 92 near its left end in mesh with a spur gear 93 mounted on a stud on the right side of the plate 88. The gear 93 has fast on its left side and concentric therewith. a pinion 94 meshing with a gear wheel 95 fast on the left end of a shaft 96. the ends of which. are journaled in the side plates 88. 89. On the right end of said shaft is fast one end of the spiral spring 97 which stores up the motor power. The other .end of this spring is fast to a cylindrical casing 98. which incloses said spring and is rigidly mounted on a gear wheel 99. said casing and gear wheel being loosely mounted on the shaft 90. The spring 97. casing 98 and gear wheel 99 constitute a spring motor 100 (Figs. 1 and 3). the gear wheel 99 of I which is in mesh with a pinion 101 loosely mounted on the shaft 76. said pinion having a groove 102 cut therein. into which is fitted a tongue 103 formed on a collar 104. on which is fast one end of a coil spring 105, the other end of which is fast to a collar 10(3 fast on the shaft 76. Therefore any rotation the spring motor 100 may impart to the pinion 101 will be transmitted through the spring 105 to the shaft Ttland associated parts. the spring acting as a shock-absorber. prolonging the life of the indexing mechanism and avoiding wreckage of the parts.

The electric motor 90. through the intermediary of the gears 92. 93, 94. and 95, rotates the shaft 96 in a clockwise direction. as seen in Figs. 2 and 3. to wind up the spring 97 which therefore exerts a continual torque on the shaft 76 in a counter-clockwise direc' tion. but said shaft is prevented from rotating by the pawl 84. which normally stands in the path of the projection 83 on the cam disk 82. In order to prevent the spring motor 100 from turning the electric motor backmotor.

ward, there is mounted on the right side of the plate 88 a pawl 107, one end of which is held in the path of the teeth of the gearwheel 93 by a spring 108, so as to enable said gear to rotate when driven by the electric motor and to prevent said gear from rotating when driven by the spring motor,. thus preventing the unwinding of said spring motor through the gearing between it and the electric motor 90. The gearing pawl, and spring between the electric and spring motor, may have substituted for it a worm and worm gear drive to simplify the structure and reduce vibration.

The'electric motor 90 is adapted to be rotated only when the spring motor 100 has become nearly exhausted. For this purpose, there is provided mechanismto automati cally close the electric switch 109 between the source of electric power and the motor 90. when the spring motor 100 has become exhausted and to automatically open said switch when sufficient power from the electric motor has been stored in the spring On the shaft 96. to the left of the spring motor casing 98, is formed a spiral groove 11 0, on which is loosely mounted a sleeve 111 carrying an arm 112 on the right, end thereof. on which is fast. a fork, the ends 113 of which project into the spiral groove 110. The lead of the spiral groove 110 is such that the clockwise rotation of the shaft 96 during which time the spring motor is being wound up. will cause the sleeve 111 to travel rightwardly along the shaft 96', and travel leftwardly along the shaft when the spring of the motor is being unwound. The sleeve 111 has an annular groove 114, either side of which is adapted to engage a roller 115 on the lower end of a tappet in the form ofa lever 116 of the first order, the upper end of which carries an electrically insulated roller 117. \Vhen the spring motor 100'has its-full amount of power stored therein, the sleeve 111 will be in its extreme rightward position. as seen in Fig. 1. As the spring motor 100 rotates to transmit rotation to the shaft 76, an arm 118, fast to the casing 98 of the spring motor and passing through a hole in the arm 112,

will transmit rotation to the sleeve 111. causing it to rotate with the spring motor, and

to slide leftwardly along the shaft 96 as the spring of the motor 100 becomes unwound. It does this because the spiral groove 110 on the shaft 96 is held stationary by the pawl 107 and the forked ends 113 are rotated in said spiral groove, giving. in effect, a screw and nut action. During said leftward motion of the sleeve 111, the side of the groove 114 will carry the roller 115 to swing the llower end of the lever 116 leftward. causing the insulated roller 117 to ride under a lower flexible electric switch terminal 119 of theswitch 1 t c e Said terminal to 

